Final answer:
Ethnocentrism is the belief that one's own culture is superior to others, often resulting in a lack of appreciation for the diversity of other cultures.
Step-by-step explanation:
The term that refers to the tendency to assume that one's own culture and way of life are superior to all others is ethnocentrism. Ethnocentrism is the idea that one's own culture is inherently superior to other cultures. As sociologist William Graham Sumner described, it is the viewpoint that one's own culture is the standard against which all other cultures should be measured. People who are ethnocentric often do not value or appreciate the perspectives, accomplishments, and unique qualities of other cultures. The opposite of ethnocentrism is xenocentrism, which refers to the belief that another culture is superior to one's own. Understanding the balance between healthy cultural pride and ethnocentrism is crucial as it helps to appreciate the diversity and value found in different cultures around the world.